George robert dawnay



(No Model.)

G. R. DAWNAY. TILE EOE PERMANENT GENTEEING To EIEEPEooE fLooEs.

Patented Aug. 1.0, 1897.

w/TNEssEs UNITED STATES PATENT OFFICE.

GEORGE ROBERT DAVNAY, OF LONDON, ENGLAND.

TILE FOR PERMANENT CENTERING TO FIREPROOF FLOORS.

SPECIFICATION forming part of Letters Patent No. 587,797', dated August10, 1897.

Application filed June 13, 1896. Serial No. 595,486. (No model.)Patented in England April 29, 1895, No. 8,402.

To all whom, it may concern:

Beit known that I, GEORGE ROBERT DAW- NAY, a resident of 9 FellbriggRoad, EastDulwich, London, in the county of Surrey, England, haveinvented certain new and useful Improvements in Tiles for PermanentCentering to Fireproof Floors, of which the fol# lowing is aspecification, reference being had to the accompanying drawings,vforming a part thereof, in which similar letters of reference indicatecorresponding parts.

This invention relates to flreproof floors and ceilings; and the objectthereof is to provide improved tiles for this purpose and improved meansfor connecting them with the joists, beams, or girders employed for thispurpose, and the invention is the same as that for which Letters Patentwere granted in Great Britain April 29, 1895, No. 8,402.

The invention is fully disclosed in the following specicatiomof whichthe accompanying drawings form a part, in which- Figure l isa sideelevation of one of the tiles which I employ, showing the method ofconnecting the same with the j oists, beams, or girders, which are shownin section; Fig. 2, a transverse section thereof on the line` a a; Fig.3, a side view of a modified form of tile; Fig. 4, a section on the lineX X of Fig. 3; Fig. 5, a plan view of the tile shown in Fig. 3; Fig. 6,asection on the line y y of Fig. 3; Fig. 7, a tranverse section of oneof the beams, joists, or girders and showing also an end view of anumberof tiles connected therewith and the method of supporting the same, thetiles shown being what are called sin gle-rib tiles.

In the drawings forming part of this specification I have shown at A,Fig. l, transverse sections of two parallel joists, which are providedat their bottoms with the usual flanges C, and in the practice of myinvention I provide cross bars or supports B, which rest upon theseilanges, and I also provide suitable tiles T, which may be made of anysuitable material and of any desired size, and which are oblong in formand of such length as to extend from one of the cross bars or supportsto the other. These tiles are provided with upwardly-directed flanges orplates D,having longitudinal flanges or projections cZ,by means of whichthey are suspendedlfrom the cross bars or supports B, and theselongitudinal flanges or projections may be provided at their outer endswith depending ribs or fillet-s d2, which are designed to hold the tilesin proper position on the cross bars or supports B and to prevent-themfrom being swung around, and the said tiles are so formed thatwhenrsuspended from the bars or supports AB they will hang in properposition or be per-v fectly counterbalanced, so that the lower surfacesthereof may be flush or even, as shown in Fig. 7.

The bottoms of the tiles are prepared with sinkings or llets to provideproper keying facilities for plaster, cement, or other material, and theupwardly-directed 'plates or anges D are formed integrally therewith,andsaid ribs or flanges are shorter than the body portion of the tile, soas to allow of passing up clear between edges of oor bearer or jois't.

The upper surfaces of the tiles are provided with longitudinal ribs G ortransverse ribs g, as shown in Figs. 2, 3, and 4, the object of theseribs being to provide proper keyings for the plaster, concrete, or othermaterial, and these ribs are so formed when placed longitudinally as toproperly counterbalance the tiles when suspended, as hereinbeforedescribed, or so that thebars or supports B will be in line with thecenter of gravity.

In place of providing the longitudinal ribs or fillets cl2 I may providepegs or nails N, which will serve for a similarl purpose and which arepassed through perforations form ed in the longitudinal flanges orprojections cl.

It will be understood that any desired num-- ber of the ribs G and g maybe employed, the only object in this connection being to providesuitable devices which will serve as' proper attachments for theplaster, concrete, or other material, and this is also true of thebottoni surface of the tiles, or said tiles may be ornamented on theirunder surfaces in any desired manner, and in this event no plastering isplaced thereon. It will'be understood, however, that projections or,openings may be substituted for the ribs G and g and that the lowersurfaces of the tiles may be similarly prepared, and the hanging rods orbars B may also be made of any desired material, and my invention is notlimited tov the means herein described for suspending IOO the tiles, andany suitable device may be einployed for this purpose.

lIaving fully described my invention, I'

the said tiles, longitudinally-extending pro.

jections secured thereto, depending ribs or fil-lets secured to theouter ends of the said projections and adapted to hold the said tile inposition, said tiles being constructed so as to balance perfectly, thebottoms of said tiles being provided with sinkings, and being providedwith vlon gitudinal ribs on the uppersurface of said tiles, all of thesaid parts being combined substantially as and for the purpose set forthand described. v

2. A ireproof iiooring consisting of the combination of a girder B;joists A, resting at its ends upon the lower flanges of two oppositegirders; cross-bars, hangers, or supports B, resting upon and againstthe lower flanges .of two opposite joists, tiles, oblong in form dicularflange D, having longitudinal lips or iianges (l, which are provided ontheir outside and under edge with a thickening or fillet d2, said tilesbeing provided with a roughening or keying surface on its bottom, forplaster, cement or the like, substantially as described.

3. A iireproof flooring consisting of the combination of a girder B',joists A, resting at its ends upon the lower flanges of two oppositegirders, cross-bars, hangers or supports B, resting upon and against thelower flanges of two opposite joists, tiles, oblong in form and of suchlength as to extend from joist to joist, hanging from the hangers orsupports B, said tiles being provided with a perpenf dicular flange l),having longitudinal lips or iauges d, which are provided on theiroutside and under edge with a thickening or llet d2, said tiles beingprovided with a smooth, finished, glazed, embossed and ornamentalsurface on its bottom, substantially as described.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of the subscribing witnesses, this 16th day of May,1896.

GEORGE ROBERT DANVNAY.

Witnesses:

HENRY GEORGE BISHOP, ARTHUR CARRICK.

